The Wang River is a river in northern Thailand

Northern Thailand

Thailand's northern region is geographically characterised by multiple mountain ranges which continue from the Shan Hills in bordering Myanmar and Laos, and the river valleys which cut through them...

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Geography

The Wang River is altogether 335nsnp;km long. Its waters flow from north to south. One of the principal settlements along the river is Lampang

Lampang

Lampang, also called Nakhon Lampang to differentiate from Lampang Province, is the third largest town in northern Thailand and capital of Lampang Province and the Lampang district. Traditional names for Lampang include Wiang Lakon and Khelang Nakhon. The city is still growing rapidly as trading...

, which is situated on the north bank of a curve in the river. From Lampang, the river extends north towards the Chiang Rai Province

Chiang Rai Province

Chiang Rai is the northernmost province of Thailand. Neighbouring provinces are Phayao, Lampang and Chiang Mai. In the north it borders Shan State of Myanmar and Bokeo of Laos.-Geography:...

. Following the river south from Lampang, it tributes the Ping River

Ping River

The Ping River , along with the Nan River, is one of the two main contributaries of Chao Phraya River. It originates at Doi Chiang Dao in Chiang Dao district, Chiang Mai Province. After passing Chiang Mai town, it flows though the provinces Lamphun, Tak, and Kamphaeng Phet...

 at the town of Tak

Tak (town)

Tak is a town in northwest of Thailand, capital of the Tak Province and the Tak district. As of 2005 the town has a population of 19,900 and an area of 7.27 km². It covers the tambon Rahaeng, Nong Luang, Chiang Ngoen and Hua Diat, and is located on the Ping River.-External links:*...

. The Ping River is itself a tributary

Tributary

A tributary or affluent is a stream or river that flows into a main stem river or a lake. A tributary does not flow directly into a sea or ocean...

 of the Chao Phraya River

Chao Phraya River

The Chao Phraya is a major river in Thailand, with its low alluvial plain forming the centre of the country. It runs through Bangkok, the capital city, and then empties into the Gulf of Thailand.-Etymology:...

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Tributaries

Tributaries of the Wang include the Mo, Tui, Chang & Soi Rivers

Wang Basin

The Wang Basin is part of the Greater Ping Basin

Ping River

The Ping River , along with the Nan River, is one of the two main contributaries of Chao Phraya River. It originates at Doi Chiang Dao in Chiang Dao district, Chiang Mai Province. After passing Chiang Mai town, it flows though the provinces Lamphun, Tak, and Kamphaeng Phet...

 and the Chao Phraya Watershed

Chao Phraya River

The Chao Phraya is a major river in Thailand, with its low alluvial plain forming the centre of the country. It runs through Bangkok, the capital city, and then empties into the Gulf of Thailand.-Etymology:...

. The total land area drained by the Wang River and its tributaries is 10,792 square kilometers.